Optical Imaging System Lens Barrel Stray Light Control
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Solution Overview
Problem
The miniaturization of mobile phone imaging lens assemblies poses challenges in reducing the size of individual lens components while maintaining high imaging quality and minimizing stray light, with existing designs struggling to effectively manage the increasing number of lenses and limited space.
Innovation Solution
An optical imaging system comprising a lens barrel structure and an imaging lens group with specific lens configurations and spacing elements, where at least one lens is arranged within the barrel, and peripheral portions of lenses are in contact with the barrel's inner wall, optimizing the arrangement of lenses and spacing elements to control stray light and improve stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of imaging lens assemblies is increased to meet customer requirements, then the imaging quality is improved, but the occupied space of each lens assembly increases
Solution Approach 1:
The patent applies nesting by placing multiple lens assemblies within a compact configuration where lens barrels are arranged concentrically or in overlapping patterns. The first lens barrel and second lens barrel are positioned to share space efficiently, with lenses nested within the barrel structures, achieving miniaturization while maintaining multiple imaging functions
Solution Approach 2:
The patent transitions from traditional linear arrangement of lenses to a three-dimensional compact layout. Lens barrels are arranged in spatial configurations that utilize vertical and radial dimensions rather than only horizontal spacing, allowing multiple lens assemblies to coexist in a reduced footprint area
2Volume of stationary object
If the size of individual lens components is reduced to achieve miniaturization, then the occupied space is decreased, but the imaging quality and stray light control deteriorate
Solution Approach 1:
The patent applies local quality by optimizing specific regions of the lens assembly differently. Spacing elements are strategically positioned at critical locations between lenses to control stray light locally, while lens barrels are designed with specific diameter ratios and curvature parameters in different zones to maintain imaging quality despite overall miniaturization
3Volume of stationary object
If the size of individual lens components is reduced to achieve miniaturization, then the occupied space is decreased, but the stray light increases
Solution Approach 1:
The patent introduces spacing elements as intermediary components between adjacent lenses. These spacing elements act as mediators that block and redirect stray light paths while maintaining the compact overall size. The spacing elements are positioned to intercept oblique light rays that would otherwise cause glare, solving the stray light problem without increasing the lens component size
4Volume of stationary object
If lenses are arranged densely to reduce space, then the miniaturization is achieved, but the system stability and lens placement precision deteriorate
Solution Approach 1:
The patent segments the lens assembly into distinct modular components: individual lens barrels, spacing elements, and mounting structures. Each lens is housed in its own barrel with dedicated spacing elements, allowing precise positioning and independent adjustment. This segmentation maintains system stability by isolating each lens's mechanical constraints while achieving overall miniaturization through compact arrangement of the segmented modules
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system achieves high imaging quality, reduced stray light, and improved system stability by effectively managing lens placement and spacing, allowing for the miniaturization of lens assemblies while maintaining performance.
Implementation Method 1
an imaging lens group, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens that are arranged sequentially along the optical axis
Data Source
AI summary
An optical imaging system, including: a lens barrel structure, including a first lens barrel and a subsequent lens barrel that are arranged sequentially along an optical axis from an object side to an image side; an imaging lens group, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens that are arranged sequentially along the optical axis from the object side to the image side; and a plurality of spacing elements, including a second spacing element that is at least partially in contact with an image-side surface of the second lens and a third spacing element that is at least partially in contact with an image-side surface of the third lens.